Peaches Geldof has angrily denied suggestions that her recent weight loss was the result of drug abuse and insisted the marks on her skin were caused by psoriasis.

Peaches Geldof has denied drug use is to blame for her dramatic weight loss (Picture: PA)

The television presenter was photographed looking gaunt and with blemishes on her arms when she attended the Vogue Fashion’s Night Out Party at the Vivienne Westwood store in London on Thursday.

Her appearance prompted claims she may have been injecting heroin, but Peaches stated there was no truth to the allegation.

‘I’m not on drugs. If people feel the need to validate my weight loss by saying I’m on drugs then shame on them,’ Peaches told the Sunday Mirror.

‘I’ve changed my diet and the way I live. That’s it. The marks on my arms have been there since childhood. Check any picture â it’s caused by a skin condition called psoriasis.’

Her mother, Paula Yates , died of a heroin overdose in 2000 and she has been consistently warned off the drug by her father, Bob Geldof, who has expressed concerns about her party lifestyle in the past.

Peaches insisted she was now living much more healthily and that was why she had got slimmer.

‘My mum was thin naturally, like I am now. So is my sister Pixie. I was eating so badly before now and then I stopped and it has fallen off,’ she added.